Utile Per Inutile Non Vitiatur Law and Legal Definition

This is a Latin maxim which means ‘a useful thing is not vitiated by a useless one’. One which is otherwise useful is not rendered invalid by a useless one. A deed or any instrument in writing, which is otherwise valid and effective, cannot be invalidated by a useless addition to it. The addition must be one that is not necessary to the original. The addition must be a superfluous one. However, a part or condition of an instrument which is necessary for its existence cannot be disregarded by merely saying it as superfluous.